1 The recoil of a gun is an example of: A Newton's first law B Newton's second law C Newton's third law D Law of gravitation
2 A body is in dynamic equilibrium when it moves with: A Increasing velocity B Constant velocity C Constant acceleration D Zero velocity
3 According to the principle of moments, for a body in equilibrium: A Clockwise moments are greater than anticlockwise moments B Anticlockwise moments are greater than clockwise moments C Clockwise moments equal anticlockwise moments D Sum of all moments is maximum
4 When a gun is fired, it recoils. This is an example of: A Newton's first law B Newton's second law C Newton's third law D Law of gravitation
5 The weight of an object is given by W = mg. What does 'g' represent in this formula? A Gravitational constant B Acceleration due to gravity C Gravitational force D Mass of the Earth
7 A couple is formed by two forces that are: A Equal in magnitude, opposite in direction, and have the same line of action B Equal in magnitude, opposite in direction, and have different lines of action C Unequal in magnitude and act in the same direction D Equal in magnitude and act in the same direction
8 Which of the following is a limitation of Newton's laws of motion? A They apply to all objects at all speeds B They fail at very high speeds approaching the speed of light C They cannot explain everyday motion D They do not apply to objects with mass
9 Which of the following is an example of a couple? A Two equal and opposite forces acting along the same line B Two equal and opposite forces acting along different parallel lines C Two unequal forces acting in the same direction D A single force acting at a point
10 Which of the following is a non-contact force? A Friction B Tension C Gravitational force D Normal reaction
11 Airbags in cars are designed to increase the time of impact in order to: A Increase the impulse B Decrease the change in momentum C Reduce the force experienced D Increase the force experienced
12 The centre of gravity of a uniform meter rod is located at: A One end of the rod B The 25 cm mark C The 50 cm mark D The 75 cm mark
13 Which of the following is a state of equilibrium? A A ball rolling down a slope B A book lying on a table C A car taking a turn D A stone falling freely
14 The moment of a force is directly proportional to: A The magnitude of the force only B The moment arm only C The product of force and moment arm D The sum of force and moment arm
15 A body is in dynamic equilibrium when it: A Is at rest B Moves with uniform velocity C Moves with changing velocity D Has zero mass
16 Which law of motion explains why a passenger tends to fall forward when a moving bus suddenly stops? A Newton's first law B Newton's second law C Newton's third law D Law of gravitation
17 Two forces of 6 N and 8 N act at right angles to each other. What is the magnitude of their resultant? A 2 N B 10 N C 14 N D 48 N
18 Which balance is more precise for measuring mass in a laboratory? A Mechanical balance B Electronic balance C Spring balance D Beam balance
19 Which of Newton's laws is also known as the law of inertia? A First law B Second law C Third law D Law of gravitation
20 Which of the following is a method to reduce friction? A Increasing the roughness of surfaces B Using lubricants C Increasing the normal force D Removing wheels from a trolley
21 In a free-body diagram, the force exerted by a surface to support the weight of an object is called: A Tension B Friction C Normal reaction D Weight
22 According to Newton's second law of motion, F = ma, where 'a' is: A Acceleration B Area C Amplitude D Atomic mass
23 A free-body diagram shows: A Only the forces acting on an object B Only the forces exerted by the object C All forces in the universe D Only the weight of the object
24 The centre of gravity of an irregular lamina can be found by: A Measuring its mass B Suspending it from different points C Heating it D Cutting it into pieces
25 A gun recoils when a bullet is fired. This is best explained by: A Newton's first law B Newton's second law C Newton's third law D Law of friction